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Arun Kumar Choudhury
Arun Kumar Choudhury (6 January 1923 – 6 September 1987) was the Indian founding head of the Department of Computer Science and Engineering at the University of Calcutta. He was a pioneer in both Analog and Digital Computing since the 1950s. A.K. Choudhury Memorial Lectures are arranged at various Indian Universities to celebrate his contributions. Career Choudhury was instrumental in building the first analog computer in India. He is best known for his work on optimization of Switching Circuits, High Threshold Logic High-threshold logic (HTL), also known as ''low-speed logic'' (''LSL'') or ''high-level logic'' (''HLL''), is a variant of diode–transistor logic used in environments where noise is very high. Operation The threshold values at the input to a ..., unate-cascade realizability and fault-tolerant synthesis of sequential machine. A list of Choudhury's publications may be found here and here. Each year, lectures on Computer Science are arranged in memory o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Purnia, Bihar
Purnia (; also romanized and officially known as Purnea) is the fourth largest city of Bihar and is emerging as the largest economic hub in North Bihar. It serves as the administrative headquarters of both Purnia district and Purnia division in the Indian state of Bihar. It is well known for its favourable climate like Darjeeling and has an abundance of resources for human settlements and economic activities. The total geographical area of Purnia Urban Agglomeration is which is next only to Patna. The population density of the city is 3058 persons per km sq. making it the 4th largest city of Bihar by population. It is nearly 315 km from Patna, as well as 171 km from Siliguri, 90 km from Bhagalpur. It is 640 km from Guwahati (Approx.) and 450 km from Kolkata, the capital of the adjacent state of West Bengal and the largest city in East India. Purnia district covers 3202.31 sq. km of the state of Bihar. The Indian Army, Indian Air Force, and three ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Calcutta
The University of Calcutta, informally known as Calcutta University (), is a Public university, public State university (India), state university located in Kolkata, Calcutta (Kolkata), West Bengal, India. It has 151 affiliated undergraduate colleges and 16 institutes in Kolkata and nearby areas. It was established on 24 January 1857 and is the oldest multidisciplinary university of Indian Subcontinent and Southeast Asian Region. Today, the university's jurisdiction is limited to a few districts of West Bengal, but at the time of its establishment it had a catchment area ranging from Kabul to Myanmar. It is accredited as an "A" grade university by the National Assessment and Accreditation Council (NAAC). The university has a total of fourteen campuses spread over the city of Kolkata and its suburbs. As of 2020, 151 colleges and 21 institutes and centres are affiliated with CU. The university was fourth in the Indian University Ranking 2021 list, released by the National Institu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rajabazar Science College
The University College of Science, Technology and Agriculture (formerly known as Rajabazar Science College) are two of five main campuses of the University of Calcutta (CU). The college served as the cradle of Indian sciences, where Raman won the Nobel Prize in Physics in 1930, with many fellowships of the The Royal Society of London, Royal Society London. History Despite the fact that the Presidency College, Kolkata, Presidency College at Calcutta witnessed great scientific research by Jagadish Chandra Bose and Prafulla Chandra Ray in the last decade of the 19th and the first decade of the 20th century, first organised scientific research at Calcutta University began with the establishment of its University College of Science and Technology in March 1914. A galaxy of Indian scientists joined the Chairs set up with the income of the endowments of nearly thirty seven and half lakhs rupees donated by Taraknath Palit, Sir Taraknath Palit and Rash Behari Ghosh, Sir Rashbehari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patna University
Patna University is a public state university in Patna, Bihar, India. It was established on 1 October 1917 during the British Raj. It is the first university in Bihar and the seventh oldest university in the Indian subcontinent in the modern era. It offers different undergraduate and postgraduate degree level courses. History Patna University was established by an Act of the Imperial Legislative Council passed in September 1917. It started the journey in October 1917 as an affiliating and examining body when JG Jennings took charge of this university as the first vice-chancellor. In the modern era of India, it is one of the oldest universities in this region. Later in 1919, the governing bodies of the university—the Senate and the Syndicate—were formed. The iconic Wheeler Senate House of the Patna University was built in 1926 for which Raja Devaki Nandan Prasad of Munger donated the money. When the university was first established it had jurisdiction over all higher educa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Analog Computer Developed At Radio Physics Dept By Dr Arun Kumar Choudhury
Analog or analogue may refer to: Computing and electronics * Analog signal, in which information is encoded in a continuous variable ** Analog device, an apparatus that operates on analog signals *** Analog electronics, circuits which use analog signals **** Analog computer, a computer that uses analog signals ** Analog recording, information recorded using an analog signal * Functional analog (electronic), a system that fulfills the same function as another * Structural analog (electronic), a system that has the same structure as another Entertainment Albums and songs * ''Analog'' (album), an album by Eureka Farm * "Analog" (song), a song by Tyler, The Creator, featuring Hodgy Beats, from ''Goblin'' * ''Analogue'' (album), a 2005 album by A-ha ** "Analogue" (All I Want), the title track of the 2005 album by A-ha Books and magazines * ''Analog Science Fiction and Fact'', a science-fiction magazine * ''ANALOG Computing'', a 1981–1989 magazine about Atari computers * '' An ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Switching Circuit Theory
Switching circuit theory is the mathematical study of the properties of networks of idealized switches. Such networks may be strictly combinational logic, in which their output state is only a function of the present state of their inputs; or may also contain sequential elements, where the present state depends on the present state and past states; in that sense, sequential circuits are said to include "memory" of past states. An important class of sequential circuits are state machines. Switching circuit theory is applicable to the design of telephone systems, computers, and similar systems. Switching circuit theory provided the mathematical foundations and tools for digital system design in almost all areas of modern technology. In an 1886 letter, Charles Sanders Peirce described how logical operations could be carried out by electrical switching circuits. During 1880–1881 he showed that NOR gates alone (or alternatively NAND gates alone) can be used to reproduce the func ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Threshold Logic
High-threshold logic (HTL), also known as ''low-speed logic'' (''LSL'') or ''high-level logic'' (''HLL''), is a variant of diode–transistor logic used in environments where noise is very high. Operation The threshold values at the input to a logic gate determine whether a particular input is interpreted as a logic 0 or a logic 1 (e.g. anything less than 1 V is a logic 0, and anything above 3 V is a logic 1; in this example, the threshold values are 1 V and 3 V). HTL incorporates Zener diodes to create a large offset between logic 1 and logic 0 voltage levels. These devices usually ran off a 15 V power supply and were found in industrial control, where the high differential was intended to minimize the effect of noise. Advantages * Increased noise margin * High noise threshold value Disadvantage *Slow speed due to increased supply voltage resulting in use of high value resistors. *High power drawn Usage It is used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montana State University
Montana State University (MSU) is a public land-grant research university in Bozeman, Montana, United States. It enrolls more students than any other college or university in the state. MSU offers baccalaureate degrees in 60 fields, master's degrees in 68 fields, and doctoral degrees in 35 fields through its nine colleges. More than 16,700 students attended MSU in the fall 2019, taught by 796 full-time and 547 part-time faculty. In the Carnegie Classification, MSU is placed among "R1: Doctoral Universities – Very high research activity", one of only two universities to receive this distinction with a "very high undergraduate" enrollment profile. The university had research expenditures of $257.9 million in 2024. Located on the south side of Bozeman, the university's campus is the largest in the state. The university's main campus in Bozeman is home to KUSM television, KGLT radio, and the Museum of the Rockies. MSU provides outreach services to citizens and communities sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1923 Births
In Greece, this year contained only 352 days as 13 days was skipped to achieve the calendrical switch from Julian to Gregorian Calendar. It happened there that Wednesday, 15 February ''(Julian Calendar)'' was followed by Thursday, 1 March ''(Gregorian Calendar).'' Events January–February * January 9, January 5 – Lithuania begins the Klaipėda Revolt to annex the Klaipėda Region (Memel Territory). * January 11 – Despite strong British protests, troops from France and Belgium Occupation of the Ruhr, occupy the Ruhr area, to force Germany to make reparation payments. * January 17 (or 9) – First flight of the first rotorcraft, Juan de la Cierva's Cierva C.4 autogyro, in Spain. (It is first demonstrated to the military on January 31.) * February 5 – Australian cricketer Bill Ponsford makes 429 runs to break the world record for the highest first-class cricket score for the first time in his third match at this level, at Melbourne Cricket Ground, giving the Victor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1987 Deaths
Events January * January 1 – Bolivia reintroduces the Boliviano currency. * January 2 – Chadian–Libyan conflict – Battle of Fada: The Military of Chad, Chadian army destroys a Libyan armoured brigade. * January 3 – Afghan leader Mohammad Najibullah says that Afghanistan's 1978 Communist revolution is "not reversible," and that any opposition parties will have to align with Communist goals. * January 4 – ** 1987 Maryland train collision: An Amtrak train en route from Washington, D.C. to Boston collides with Conrail engines at Chase, Maryland, United States, killing 16 people. ** Televangelist Oral Roberts announces to his viewers that unless they donate $8 million to his ministry by March 31, God will "call [him] home." * January 15 – Hu Yaobang, General Secretary of the Chinese Communist Party, is forced into retirement by political conservatives. * January 16 – León Febres Cordero, president of Ecuador, is kidnapped for 11 hours by followers of imprisoned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Academic Staff Of The University Of Calcutta
An academy (Attic Greek: Ἀκαδήμεια; Koine Greek Ἀκαδημία) is an institution of tertiary education. The name traces back to Plato's school of philosophy, founded approximately 386 BC at Akademia, a sanctuary of Athena, the goddess of wisdom and skill, north of Athens, Greece. The Royal Spanish Academy defines academy as scientific, literary or artistic society established with public authority and as a teaching establishment, public or private, of a professional, artistic, technical or simply practical nature. Etymology The word comes from the ''Academy'' in ancient Greece, which derives from the Athenian hero, '' Akademos''. Outside the city walls of Athens, the gymnasium was made famous by Plato as a center of learning. The sacred space, dedicated to the goddess of wisdom, Athena, had formerly been an olive grove, hence the expression "the groves of Academe". In these gardens, the philosopher Plato conversed with followers. Plato developed his sessio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Calcutta Alumni
A university () is an institution of tertiary education and research which awards academic degrees in several academic disciplines. ''University'' is derived from the Latin phrase , which roughly means "community of teachers and scholars". Universities typically offer both undergraduate and postgraduate programs. The first universities in Europe were established by Catholic monks. The University of Bologna (), Italy, which was founded in 1088, is the first university in the sense of: *being a high degree-awarding institute. *using the word (which was coined at its foundation). *having independence from the ecclesiastic schools and issuing secular as well as non-secular degrees (with teaching conducted by both clergy and non-clergy): grammar, rhetoric, logic, theology, canon law and notarial law.Hunt Janin: "The university in medieval life, 1179–1499", McFarland, 2008, , p. 55f.de Ridder-Symoens, Hilde''A History of the University in Europe: Volume 1, Universities in the Midd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
